Clamping mechanism and steel bar bender

Abstract

The utility model belongs to the technical field of steel bar machining, and discloses a clamping mechanism and a steel bar bender, the clamping mechanism comprises a mounting seat, a fixed clamping block, a movable clamping block and a clamping driving assembly; the fixed clamping block is fixed on the mounting seat; the movable clamping block is arranged on the mounting base in a sliding mode in the first direction, and a clamping space is formed between the movable clamping block and the fixed clamping block; the clamping driving assembly comprises a swing arm, a supporting rod and a clamping driving piece, the supporting rod is hinged to the mounting base, the swing arm is hinged to the supporting rod, the first end of the swing arm is hinged to the movable clamping block, the second end of the swing arm is hinged to the clamping driving piece, the clamping driving piece is hinged to the mounting base, and the swing arm is a labor-saving lever. And larger clamping force can be provided for the movable clamping block, so that a workpiece in a clamping space is effectively clamped.

Description

Technical Field

[0001] This utility model relates to the field of steel bar processing technology, and in particular to a clamping mechanism and a steel bar bending machine. Background Technology

[0002] In the process of steel bar processing, it is often necessary to bend the ends of steel bars cut into certain lengths. If a manual bending machine is used to bend the steel bars, the workers need to take the steel bars to the bending machine for manual positioning. Because the bending force is large and the steel bars are elastic, the steel bars can easily fall off the bending machine, which not only affects the bending efficiency but also easily causes work-related injuries.

[0003] Therefore, in order to fix the reinforcing bars, bending machines are usually equipped with a clamping mechanism. The clamping mechanism includes a fixed clamping block and a movable clamping block connected to a drive cylinder. The movable clamping block moves closer to or away from the fixed clamping block under the action of the drive cylinder to clamp or release the reinforcing bars. However, the clamping force applied by the drive cylinder to the reinforcing bars is limited, and there is still a risk of the reinforcing bars falling off when the bending force is large. Utility Model Content

[0004] One of the purposes of this utility model is to provide a clamping mechanism to solve the problem of different clamping forces on steel bars.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] In a first aspect, embodiments of this utility model provide a clamping mechanism, including a mounting base, a fixed clamping block, a movable clamping block, and a clamping drive assembly; the fixed clamping block is fixed to the mounting base; the movable clamping block is slidably disposed on the mounting base along a first direction, and a clamping space is formed between the movable clamping block and the fixed clamping block; the clamping drive assembly includes a swing arm, a support rod, and a clamping drive member, the support rod is hinged to the mounting base via a first hinge axis, the swing arm is hinged to the support rod via a second hinge axis, and a first end of the swing arm is hinged to the movable clamping block via a third hinge axis, a second end of the swing arm is hinged to the clamping drive member via a fourth hinge axis, the clamping drive member is hinged to the mounting base, and the distance between the first hinge axis and the third hinge axis is less than the distance between the first hinge axis and the fourth hinge axis.

[0007] In one embodiment, the movable clamping block includes a first clamping part, a second clamping part, and an elastic member. The second clamping part is disposed on the side of the first clamping part away from the fixed clamping block and is movably connected to the first clamping part. The elastic member is disposed between the first clamping part and the second clamping part.

[0008] In one embodiment, the first clamping part is hinged to the second clamping part via a fifth hinge axis.

[0009] In one embodiment, the first clamping part is provided with limiting grooves on both sides along the second direction. The limiting grooves have openings facing the second clamping part. The second clamping part includes a connecting block. The connecting block is rotatably disposed in the limiting groove via the fifth hinge shaft. The first clamping part and / or the second clamping part are provided with mounting grooves. The elastic element is an elastic gasket. The elastic gasket is confined in the mounting groove. The second direction is perpendicular to the first direction.

[0010] In one embodiment, the clamping mechanism further includes a lifting assembly, which includes a lifting drive and a lifting member. The lifting drive is configured to drive the lifting member to reciprocate along a third direction to push the workpiece in the clamping space out of the clamping space, wherein the third direction is perpendicular to the first direction.

[0011] In one embodiment, the first direction is inclined to the horizontal plane, the mounting base has a top plate extending along the first direction, and both the fixed clamping block and the movable clamping block are disposed on the top plate.

[0012] In one embodiment, the movable clamping block is located on the side of the top plate that is relatively higher in the first direction relative to the fixed clamping block. The fixed clamping block is provided with an inclined third guide surface on the side facing away from the movable clamping block. The third guide surface extends from the side close to the movable clamping block to abut against the top plate.

[0013] In one embodiment, the clamping mechanism further includes a walking component, which includes a walking drive, a first guide wheel, and a second guide wheel. The walking drive is configured to drive the clamping mechanism to walk on a guide rail. Two sets of the first guide wheels are arranged vertically at intervals, and two sets of the second guide wheels are arranged at intervals along a direction perpendicular to the extension of the guide rail. Both the first guide wheel and the second guide wheel are in rolling contact with the guide rail.

[0014] In one embodiment, the clamping drive includes two fixedly connected thin cylinders, the output shafts of the two thin cylinders are on the same straight line, and the output shaft of one thin cylinder is hinged to the mounting base, while the output shaft of the other thin cylinder is hinged to the swing arm.

[0015] On the other hand, an embodiment of the present invention provides a rebar bending machine, including a bending mechanism and a clamping mechanism as described in any of the above embodiments, wherein the clamping mechanism is configured to clamp the rebar when the bending mechanism bends the rebar.

[0016] The beneficial effects of this utility model are:

[0017] In this embodiment of the invention, the clamping mechanism utilizes a swing arm to connect a movable clamping block. The swing arm acts as a force-saving lever, effectively clamping the workpiece and preventing it from detaching from the clamping space, provided that the force applied by the clamping drive component is the same. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the clamping mechanism in an embodiment of this utility model;

[0019] Figure 2 This is a front view of the clamping mechanism in an embodiment of this utility model;

[0020] Figure 3 This is a side view of the clamping mechanism in an embodiment of this utility model;

[0021] Figure 4 yes Figure 3 Sectional view along the middle AA direction;

[0022] Figure 5 This is a schematic diagram of the structure of the movable clamping block in an embodiment of this utility model;

[0023] Figure 6 This is a cross-sectional view of the movable clamping block in an embodiment of this utility model.

[0024] In the picture:

[0025] 1. Mounting base; 11. First support plate; 12. Second support plate; 13. Top plate; 131. Clearance hole; 132. Second guide member; 2. Fixed clamping block; 21. First guide surface; 23. Third guide surface; 3. Movable clamping block; 31. First clamping part; 311. Limiting groove; 312. Mounting groove; 313. Second guide surface; 32. Second clamping part; 321. Connecting block; 33. Elastic member; 34. First guide member; 4. Clamping drive assembly; 41. Clamping drive member; 42. Swing arm; 43. Support rod; 5. Lifting assembly; 51. Lifting drive member; 52. Lifting member; 6. Traveling assembly; 61. Traveling drive member; 62. Traveling support base; 63. Gear; 64. First guide wheel; 65. Second guide wheel. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0027] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0030] refer to Figures 1-6 As shown, an embodiment of this utility model proposes a clamping mechanism, including a mounting base 1, a fixed clamping block 2, a movable clamping block 3, and a clamping drive assembly 4. The fixed clamping block 2 is fixed to the mounting base 1, and the movable clamping block 3 is slidably disposed on the mounting base 1 along a first direction. A clamping space is formed between the sliding clamping block and the fixed clamping block 2. The clamping drive assembly 4 is connected to the movable clamping block 3 and is configured to drive the movable clamping block 3 along the first direction (…). Figure 1 and Figure 2The workpiece moves towards or away from the fixed clamping block 2 (in the X direction and its opposite). To achieve greater clamping force and effective workpiece clamping, the clamping drive assembly 4 includes a swing arm 42, a support rod 43, and a clamping drive member 41. The support rod 43 is hinged to the mounting base 1 via a first hinge axis, the swing arm 42 is hinged to the support rod 43 via a second hinge axis, and the first end of the swing arm 42 is hinged to the movable clamping block 3 via a third hinge axis. The second end of the swing arm 42 is hinged to the clamping drive member 41 via a fourth hinge axis. The clamping drive member 41 is hinged to the mounting base 1 and is configured to drive the swing arm 42 to swing around the second hinge axis. It should be emphasized that the distance between the first and third hinge axes is less than the distance between the first and fourth hinge axes.

[0031] In the above-mentioned clamping mechanism, since the distance between the first hinge axis and the third hinge axis is less than the distance between the first hinge axis and the fourth hinge axis, the swing arm 42 is equivalent to a force-saving lever. Under the premise that the force applied by the clamping drive member 41 is the same, the force transmitted to the movable clamping block 3 through the swing arm 42 is greater than the force applied directly to the movable clamping block 3, thereby effectively clamping the workpiece and preventing the workpiece from leaving the clamping space.

[0032] refer to Figure 2 and Figure 4 As shown, the mounting base 1 includes a first support plate 11 and a second support plate 12 arranged in parallel and vertically, and a top plate 13 fixedly connected between the first support plate 11 and the second support plate 12. The first support plate 11, the second support plate 12 and the top plate 13 cooperate to form an installation space. The clamping drive assembly 4 is disposed in the installation space. An avoidance hole 131 is provided on the top plate 13. The movable clamping block 3 passes through the avoidance hole 131 from above the top plate 13 into the installation space and is connected to the swing arm 42.

[0033] In order to ensure that the movable clamping block 3 moves stably when moving in the first direction, a first guide 34 is provided on the movable clamping block 3, and a second guide 132 is provided at the bottom of the top plate 13. The first guide 34 and the second guide 132 are slidably engaged, that is, the movable clamping block 3 and the top plate 13 are slidably connected by the mutual cooperation of the first guide 34 and the second guide 132.

[0034] Specifically, the first guide member 34 is configured as a sliding shaft, and the second guide member 132 is a guide block. The guide block has a through hole extending along the first direction. The sliding shaft passes through the through hole and slides with the sliding block, and the sliding block provides guidance for the movement of the sliding shaft. More specifically, two sliding blocks are spaced apart along the first direction to further improve the guiding accuracy.

[0035] In addition, in order to reduce the difficulty of the workpiece entering the clamping space, the top surfaces of the fixed clamping block 2 and the movable clamping block 3 are respectively provided with an inclined first guide surface 21 and a second guide surface 313. The first guide surface 21 and the second guide surface 313 gradually tilt upward along the first direction from the side that is close to each other to the side that is far away from each other, thereby forming a conical guide opening. The workpiece enters the clamping space after being guided by the guide opening.

[0036] In one embodiment, the movable clamping block 3 further includes a first clamping part 31, a second clamping part 32, and an elastic member 33. A second guide surface 313 is disposed on the first clamping part 31. The second clamping part 32 is disposed on the side of the first clamping part 31 away from the fixed clamping block 2 and is movably connected to the first clamping part 31. The elastic member 33 is disposed between the first clamping part 31 and the second clamping part 32, so that the first clamping part 31 tends to move away from the second clamping part 32 in a first direction. When the movable clamping block 3 cooperates with the fixed clamping block 2 to clamp the workpiece, the first clamping part 31 first abuts against the workpiece and moves towards the second clamping part 32. The elastic member 33 provides a buffer for the first clamping part 31 to avoid damage to the workpiece. At the same time, the above-mentioned structure of the movable clamping block 3 can clamp workpieces of different specifications when the clamping drive member 41 has the same stroke, and has a wide range of applications.

[0037] In one embodiment, the clamping drive 41 is a cylinder. Specifically, the clamping drive 41 includes two symmetrically arranged and fixedly connected thin cylinders. The output shafts of the two thin cylinders are located on the same straight line and are arranged opposite to each other. The output shaft of one thin cylinder is hinged to the mounting base 1, and the output shaft of the other thin cylinder is hinged to the second end of the swing arm 42.

[0038] In one embodiment, reference Figure 5 As shown, the first clamping part 31 is hinged to the second clamping part 32 via the fifth hinge axis. As for the elastic element 33, it can be an elastic structure including but not limited to elastic pads, springs, etc. Considering the operating frequency of the clamping mechanism, the elastic element 33 in this embodiment uses an elastic pad to give the movable clamping block 3 a longer service life.

[0039] More specifically, the first clamping part 31 is along the second direction ( Figure 1 and Figure 2 Limiting grooves 311 are provided on both sides of the Y-direction and the opposite direction. The limiting grooves 311 have slots facing the second clamping part 32. The second clamping part 32 includes a connecting block 321. The connecting block 321 is rotatably disposed in the limiting groove 311 through the fifth hinge shaft. The setting of the limiting groove 311 and the connecting block 321 makes the structure of the entire movable clamping block 3 more compact and helps to save space.

[0040] Continue to refer to Figure 5As shown, the first clamping part 31 has a mounting groove 312 on the side facing the second clamping part 32. The elastic gasket is confined within the mounting groove 312 and protrudes from the opening of the mounting groove 312, reducing the installation difficulty of the elastic gasket. The elastic gasket can be made of materials including but not limited to silicone. It should be emphasized that the groove wall of the limiting groove 311 restricts the rotation angle of the connecting block 321, preventing the elastic gasket from disengaging from the mounting groove 312 due to excessive distance between the first clamping part 31 and the second clamping part 32.

[0041] In other embodiments, the elastic pad may also be provided on the side of the second clamping part 32 facing the first clamping part 31, and the first clamping part 31 is provided with a corresponding mounting groove 312, or the elastic pad may be provided on the side of the first clamping part 31 and the second clamping part 32 facing each other.

[0042] refer to Figure 4 As shown, the clamping mechanism also includes a lifting assembly 5, which further includes a lifting drive 51 and a lifting member 52. The lifting drive 51 is disposed on the mounting base 1 and located below the clamping space. The lifting member 52 is disposed at the output end of the lifting drive 51. The lifting drive 51 is configured to drive the lifting member 52 along a third direction. Figure 1 The lifting member 52 moves back and forth in the Z direction and its opposite direction. When it rises, it can push the workpiece in the clamping space out of the clamping space. The first direction, the second direction and the third direction are perpendicular to each other.

[0043] Specifically, the lifting member 52 includes two lifting plates spaced apart along the second direction. Both lifting plates are fixed to the output end of the lifting drive member 51, and the two lifting plates are located on both sides of the movable clamping block 3 or the fixed clamping block 2 along the second direction, so as to simultaneously lift the opposite sides of the workpiece.

[0044] In one embodiment, in order to enable the workpiece to automatically disengage from the clamping mechanism and enter the next process, the first direction is inclined to the horizontal plane, the top plate 13 extends along the first direction, and after the workpiece is pushed out of the clamping space by the lifting component 5, it can roll down along the inclined direction of the top plate 13 to automatically enter the next process.

[0045] Specifically, the movable clamping block 3 is located on the side of the top plate 13 with a relatively higher height relative to the fixed clamping block 2 along the first direction. The side of the fixed clamping block 2 facing away from the movable clamping block 3 is configured as an inclined third guide surface 23. The third guide surface 23 gradually approaches the top plate 13 from the side closer to the movable clamping block 3 to the side farther away from the movable clamping block 3 until it abuts against the top plate 13. After the workpiece is pushed out of the clamping space by the lifting assembly 5, it first rolls along the third guide surface 23 onto the top plate 13, and then rolls along the top plate 13 to the next process.

[0046] In one embodiment, the clamping mechanism further includes a traveling component 6 to drive the entire clamping mechanism to the middle position of the workpiece, thereby achieving a better clamping effect. Specifically, the traveling component 6 includes a traveling support 62 and a traveling drive 61. The traveling support 62 is fixed to the bottom of the mounting base 1, and the traveling drive 61 is configured to provide traveling power to the traveling support 62, causing the traveling support 62 to move along the external guide rail.

[0047] In one embodiment, the walking drive 61 is a walking motor. To convert rotational motion into linear motion, the walking assembly 6 further includes a gear 63 and a rack. The gear 63 is disposed at the output end of the walking motor, and the rack is disposed on the guide rail and meshes with the gear 63. Alternatively, the walking assembly 6 may also include a lead screw and a lead screw sleeve. The lead screw and the lead screw sleeve rotate helically, and the walking motor is connected to the lead screw.

[0048] The walking assembly 6 also includes a first guide wheel 64 and a second guide wheel 65 disposed on the walking support 62, with the axes of the first guide wheel 64 and the second guide wheel 65 perpendicular to each other. The first guide wheel 64 comprises two sets spaced vertically apart, each set capable of rolling contact with the upper and lower surfaces of the guide rail. The second guide wheel 65 comprises two sets spaced perpendicular to the extension direction of the guide rail, each set capable of rolling contact with the surfaces on both sides of the guide rail width. This prevents the clamping mechanism from detaching from the guide rail and improves the stability of the clamping mechanism during movement.

[0049] In other embodiments, the walking drive 61 may also adopt a linear drive structure, such as a linear module.

[0050] Based on the setting of the first direction being inclined relative to the horizontal plane, in one embodiment, the mounting base 1 and the gear 63 are respectively set on opposite sides of the walking support base 62 along the horizontal direction, the first guide wheel 64 and the second guide wheel are both located on the same side of the gear 63, and the first support plate 11 and the second support plate 12 are inclined towards the gear 63 to maintain the stability of the center of gravity of the entire clamping mechanism.

[0051] This utility model also proposes a rebar bending machine, including a bending mechanism and a clamping mechanism as described in any of the above embodiments. Depending on the bending requirements of the rebar, one or two bending mechanisms can be provided. Taking two bending mechanisms as an example, the two bending mechanisms are located on opposite sides of the clamping mechanism, and based on the guide rail, both bending mechanisms are slidably mounted on the guide rail to adjust the bending position according to the length of the rebar. The bending mechanism is prior art and will not be described in detail here. The clamping mechanism clamps the rebar when the bending mechanism bends it, preventing the rebar from falling off.

[0052] In addition, the rebar bending machine also includes a walking mechanism, a rebar ejection mechanism, a mold unlocking mechanism, and a mold conversion mechanism. The walking mechanism is used to drive the bending mechanism to move along the guide rail. The rebar ejection mechanism is used to eject the bent rebar. The bending mechanism includes a mold with a self-locking function. The mold unlocking mechanism is used to unlock the mold from the locking shaft of the bending mechanism used to install the mold. The mold conversion mechanism is used to change the mold.

[0053] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A clamping mechanism, characterized in that, The clamping mechanism includes: Mounting base (1); The clamping block (2) is fixed to the mounting base (1); The movable clamping block (3) is slidably disposed on the mounting base (1) along the first direction, and a clamping space is formed between the movable clamping block (3) and the fixed clamping block (2); A clamping drive assembly (4) includes a swing arm (42), a support rod (43), and a clamping drive member (41). The support rod (43) is hinged to the mounting base (1) via a first hinge axis. The swing arm (42) is hinged to the support rod (43) via a second hinge axis. The first end of the swing arm (42) is hinged to the movable clamping block (3) via a third hinge axis. The second end of the swing arm (42) is hinged to the clamping drive member (41) via a fourth hinge axis. The clamping drive member (41) is hinged to the mounting base (1). The distance between the first hinge axis and the third hinge axis is less than the distance between the first hinge axis and the fourth hinge axis.

2. The clamping mechanism according to claim 1, characterized in that, The movable clamping block (3) includes a first clamping part (31), a second clamping part (32), and an elastic member (33). The second clamping part (32) is disposed on the side of the first clamping part (31) away from the fixed clamping block (2) and is movably connected to the first clamping part (31). The elastic member (33) is disposed between the first clamping part (31) and the second clamping part (32).

3. The clamping mechanism according to claim 2, characterized in that, The first clamping part (31) is hinged to the second clamping part (32) via a fifth hinge axis.

4. The clamping mechanism according to claim 3, characterized in that, The first clamping part (31) is provided with limiting grooves (311) on both sides along the second direction. The limiting grooves (311) have a slot facing the second clamping part (32). The second clamping part (32) includes a connecting block (321). The connecting block (321) is rotatably disposed in the limiting groove (311) through the fifth hinge shaft. The first clamping part (31) and / or the second clamping part (32) are provided with mounting grooves (312). The elastic element (33) is an elastic gasket. The elastic gasket is limited to the mounting groove (312). The second direction is perpendicular to the first direction.

5. The clamping mechanism according to claim 3, characterized in that, The clamping mechanism further includes a lifting assembly (5), which includes a lifting drive (51) and a lifting member (52). The lifting drive (51) is configured to drive the lifting member (52) to reciprocate along a third direction to push the workpiece in the clamping space out of the clamping space. The third direction is perpendicular to the first direction.

6. The clamping mechanism according to claim 3, characterized in that, The first direction is inclined to the horizontal plane, the mounting base (1) has a top plate (13) extending along the first direction, and the fixed clamping block (2) and the movable clamping block (3) are both disposed on the top plate (13).

7. The clamping mechanism according to claim 6, characterized in that, The movable clamping block (3) is located on the side of the top plate (13) with a relatively higher height relative to the fixed clamping block (2) along the first direction. The fixed clamping block (2) has an inclined third guide surface (23) on the side facing away from the movable clamping block (3). The third guide surface (23) extends from the side close to the movable clamping block (3) to abut against the top plate (13).

8. The clamping mechanism according to any one of claims 1-7, characterized in that, The clamping mechanism further includes a walking component (6), which includes a walking drive (61), a first guide wheel (64), and a second guide wheel (65). The walking drive (61) is configured to drive the clamping mechanism to walk on the guide rail. Two sets of the first guide wheels (64) are arranged vertically at intervals, and two sets of the second guide wheels (65) are arranged at intervals along the direction perpendicular to the extension of the guide rail. Both the first guide wheel (64) and the second guide wheel (65) are in rolling contact with the guide rail.

9. The clamping mechanism according to any one of claims 1-7, characterized in that, The clamping drive (41) includes two thin cylinders fixedly connected together. The output shafts of the two thin cylinders are on the same straight line, and the output shaft of one of the thin cylinders is hinged to the mounting base (1), while the output shaft of the other thin cylinder is hinged to the swing arm (42).

10. A rebar bending machine, characterized in that, It includes a bending mechanism and a clamping mechanism as described in any one of claims 1-9, wherein the clamping mechanism is configured to clamp the reinforcing bar when the bending mechanism bends the reinforcing bar.

Images